What Size Air Conditioner Do I Need For My Home?

If “Hot Hot Hot” has been your personal theme song of late, you may be wondering what size air conditioner you need for your room. Here’s what you need to know, courtesy of EnergyStar.gov:

Footprint is everything

Ideal air conditioner capacity is directly related to the square footage of the area you need cooled. So first, measure the area. Then, consult this handy ENERGY STAR table:

Area To Be Cooled (square feet)

Capacity Needed (BTUs per hour)

100 up to 150 5,000
150 up to 250 6,000
250 up to 300 7,000
300 up to 350 8,000
350 up to 400 9,000
400 up to 450 10,000
450 up to 550 12,000
550 up to 700 14,000
700 up to 1,000 18,000
1,000 up to 1,200 21,000
1,200 up to 1,400 23,000
1,400 up to 1,500 24,000
1,500 up to 2,000 30,000
2,000 up to 2,500 34,000

If you’re wondering, BTUs are British thermal units. Modern air conditioning may have been invented in America, but we measure it with a standard from across the pond.

Bigger isn’t always better

If you’re sweating bullets just sitting in your room, you may think that climate-controlled salvation will come in the form of an air conditioner suitable for a Las Vegas gymnasium. But as ENERGY STAR points out, buying too big will waste energy and won’t even feel as nice. That’s because it won’t remove enough humidity, giving your room a “damp, clammy feeling.”

Your situation may vary

Determine the right air conditioner for your home

Also, make sure your unit is pushing air in the right direction rather than into a corner.

We’re here to help

At Newcomb and Company, comfort is our business. If you’re looking for professional guidance on cooling down a house, a room, or an entire building, please get in touch.

Need help? Call now.